Why 'and' not '&&' ? (was Cleaning up 'uninitialized value')

[Peter Cornelius]

> Use:
> 
>   if (@ARGV and -T $ARGV[0]) { ... }

Just wondering if there is a reason for using the lower precedence 'and'
here instead of '&&'?  I haven't been finding many uses for 'and' which
tells me I might not fully understand it.

Thanks,
Peter C.